2. Getting the progress from an asynchronous TTURLRequest. Well, the TTURLRequestDelegate protocol has a method called requestDidUploadData, but this is only used by uploads (POST with some body). Well, thought I will implement something, but a quick google search found me that: https://github.com/facebook/three20/pull/288
So, I was not the first to tackle this... thanks Cemal Eker!

3. After implementing this, I still had an issue. I found out that I made a stupid mistake. I was waiting in a loop for the request to finish doing [NSThread sleepForTimeInterval:0.5]. This caused both the URLRequest to not function as well as my view controller to not show up..
So, don't do that, you are going to get a requestDidFinish in your delegate, so no need to sit in a loop...